The Aiyy Faith (Yakut: Айыы итэҕэлэ, romanized: Aiyy Iteghele) is a neo-Tengrist Yakut religious organization that has been registered since 2015 in Yakutsk, Sakha Republic (Yakutia), Russia. This organization, formerly known as Kut-Siur (Yakut: Кут-сүр — Heart-Soul-Mind) was founded in 1990 and established in 1993 in Yakutsk.